Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cluster shapes and plastids in zone IV. A, Dense plastid clusters are present after 14 d in microgravity. B, Looser clusters develop after 6 h of clinostat rotation. C, Elongated clusters in cells inverted for 6 h. Note scarcity of plastids above nucleus. Scale bar = 25 μm.
